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Service bulletin 21-022-14 REV. A

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10217727
Published by NHTSA2022-08-15
Manufacturer's number21-022-14 REV. A
Manufacturer's date2014-07-29
NHTSA componentELECTRICAL SYSTEM; POWER TRAIN; EQUIPMENT

NHTSA's summary

4WD Lamp Illuminated and Diagnostic Trouble Code C140F Active in Final Drive Control Modules (FDCM) Memory This bulletin involves verifying FDCM software level and then flash reprogramming of the FDCM with new software. Customers may indicate that the ?Service 4WD? indicator in the instrument cluster is illuminated. They may also indicate that the transfer case will not shift from 4WD High, 4WD Low, and/or Neutral once the lamp is illuminated. Further investigation identifies that a Diagnostic Trouble Code C140F is stored or active in the Final Drive Control Modules (FDCM) Memory

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Equipment and accessories, Transmission and driveline

Trouble codes named

C140F

Vehicles listed
JEEP COMMANDER2006, 2007, 2008, 2009, 2010
JEEP GRAND CHEROKEE2005, 2006, 2007, 2008, 2009, 2010

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20144042014-09-18. Electrical
14V5670002014-09-17. ELECTRICAL SYSTEM:IGNITION
20143122014-07-23. Electrical
14V4380002014-07-21. ELECTRICAL SYSTEM:IGNITION:SWITCH
20131552013-05-08. Powertrain
13V1750002013-05-07. ELECTRICAL SYSTEM; POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE)
10V2000002010-05-11. ELECTRICAL SYSTEM:IGNITION:MODULE
10V0850002010-03-05. EQUIPMENT
09V4540002009-11-25. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
09V1180002009-04-09. AIR BAGS:FRONTAL; AIR BAGS; ELECTRICAL SYSTEM:WIRING

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
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V512022-12-19. Service bulletin. Customer Satisfaction Notification V51 Reprogram Powertrain Control Module
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